I teach a molecular biology course “Biology of Cells” in the Natural Sciences Tripos at the University of Cambridge which gives a fascinating introduction to our wonderful units of life. I currently supervise for Sidney Sussex College.
Narrated inner life of cell cartoon (really good)
Cell Snapshots – very detailed but nice summaries on a range of cell biology topics
free textbooks Cambridge core (run by Cambridge University Press) are currently providing free access to textbooks
For current students
Googledoc with extra resources/answers to questions.
quizlet – allows you to create revision flashcards